Home / 12,485.16-18,739.26-8,738.28

Finding the Fourth Proportional to 12,485.16, 18,739.26 and 8,738.28

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Solution

The fourth proportional to 12,485.16, 18,739.26 and 8,738.28 is: 13,115.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.16 : 18,739.26 = 8,738.28 : x
  2. Step 2: Convert to fraction form
    12,485.16/18,739.26 = 8,738.28/x
  3. Step 3: Cross multiply
    12,485.16x = 18,739.26 × 8,738.28
  4. Step 4: Simplify right side
    12,485.16x = 163,748,900.87
  5. Step 5: Solve for x
    x = 163,748,900.87/12,485.16
  6. Step 6: Final answer
    x = 13,115.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.